06
WHISPA III
®
5000, 9000 & 12000 RCU
7.0 Water Connection
C
B
A
Fig. 3
G
This unit is supplied with ½" compression isolating valves.
Bring ½ " copper tubing to the unit and make the
compression joints. Connect the supply to the left hand
isolating valve. This is necessary to allow proper venting and
purging of the fan convector.
G
The WHISPA III
®
RCU fan convector is fitted with a flow
regulator set at 1 GPM maximum. If another pre-set
maximum flowrate is required then the insert can be changed
at this stage. Unscrew the insert cap on the flow control valve.
Remove the insert and replace with the alternative. Replace
cap and tighten.
G
Many installers are now beginning to use flexible heat tubing
to make these connections. Ensure prior to use that the
tubing selected is appropriate for the water temperature to
be supplied.
G
Once the connections to the heating loop are complete, the
unit must be vented using the air purge valve. Fit a length of
hose to the purge valve so that any water from the heating
circuit escaping during the venting process can be directed
to waste, see Fig 3. Open the air purge valve by loosening
the screw.
G
Open the left hand valve at the bottom of the unit and purge
the unit for 1-2 minutes. Close the LH valve and then open
the RH valve. Switch on the supply to the unit and energise
the flow control valve by switching on the room thermostat.
Purge the air from the unit, then close the RH valve and switch
off the room thermostat. Close the purge valve, disconnect
the hose and open both valves.
G
When the operation of the unit has been tested, align and
secure the front cover (eight screws), see Fig 4.
Model
A
B
C
Dimensions (in)
5000
14
3
/
16
13
5
/
8
10
3
/
8
7000
19
1
/
8
17
1
/
8
15
1
/
16
9000
31
5
/
8
29
1
/
4
27
1
/
8
Note: dimensions in inches.
22072 Whispa RCU (US) Manual:Layout 1 10/9/09 12:21 Page 7
